Integrated wastewater treatment device with ultraviolet synergistic electro-catalytic oxidation

Abstract

The utility model provides a kind of ultraviolet synergic electrocatalytic oxidation integrated sewage treatment device, it is related to sewage treatment technical field, the reaction tank box of this sewage treatment device is equipped with water treatment cavity and overflow cavity;Water treatment cavity is equipped with electrocatalytic oxidation area and ultraviolet catalytic oxidation area, electrolytic chamber and ultraviolet catalytic chamber are separated by baffle of zigzag flow.The utility model provides beneficial effect is as follows: the electrocatalytic oxidation area of this sewage treatment device can be generated hydroxyl radical, ozone, hydrogen peroxide and active chlorine etc. strong oxidant by electrolytic chamber to remove organic matter in sewage, ultraviolet catalytic chamber can be catalyzed by ultraviolet line ozone, hydrogen peroxide and residual chlorine in sewage, to realize the efficient treatment of high-salt organic sewage containing chlorine;And the water treatment chamber of this sewage treatment device adopts zigzag flow design, this design can extend the residence time of sewage in water treatment chamber, reduce electrode plate consumption, so that the volume of sewage treatment device can be reduced, reduce the production cost of sewage treatment device.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation. Background Technology

[0002] Industries such as pesticide manufacturing, pharmaceutical and chemical production, and dye production generate large amounts of chlorinated organic wastewater. This wastewater is highly toxic and difficult to degrade. Traditional treatment devices for chlorinated organic wastewater typically employ chemical or electrochemical oxidation methods. Chemical oxidation devices require the addition of large amounts of oxidants (such as H₂O₂ and O₃), resulting in high operating costs and the generation of secondary pollution such as iron sludge. Furthermore, they have low mineralization rates for chlorinated organic compounds and may produce more toxic intermediate products (such as chlorocarboxylic acids). They also cannot effectively remove residual chlorine from the wastewater, requiring the addition of reducing agents (such as Na₂SO₃) or activated carbon adsorption, increasing the number of treatment steps and costs. Traditional electrocatalytic oxidation devices typically use a single anode structure, which converts chlorine-containing components in the water into active chlorine species such as chlorine gas (Cl₂) and hypochlorous acid during electrolysis. While it can oxidize organic matter, residual chlorine remains a significant problem. Therefore, there is an urgent need to develop an integrated device that can simultaneously degrade organic matter and remove residual chlorine. Utility Model Content

[0003] In view of this, the present invention provides an integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation, including a reaction tank;

[0004] The reaction tank is equipped with an overflow plate, which divides the cavity inside the reaction tank into a water treatment cavity and an overflow cavity.

[0005] The water treatment chamber is equipped with N baffles, which divide the cavity inside the water treatment chamber into N+1 water treatment chambers. The side edge of each baffle forms a baffle opening between the inner wall of the reaction tank and the side edge of the baffle. All the baffle openings are arranged in an alternating pattern.

[0006] The two water treatment chambers located at both ends of the water treatment chamber are the inlet chamber and the ultraviolet catalytic chamber, respectively. The remaining water treatment chambers are electrolysis chambers. The ultraviolet catalytic chamber is close to the overflow chamber. The inlet chamber is connected to an inlet pipe, and the overflow chamber is connected to a drain pipe.

[0007] Each electrolysis chamber is equipped with multiple cathode plates and anode plates, which are arranged alternately.

[0008] The ultraviolet catalytic chamber is equipped with multiple ultraviolet lamps.

[0009] Furthermore, all water treatment chambers are equipped with a drain plate at the bottom, and the drain plate has multiple through sludge discharge holes.

[0010] Furthermore, the lower part of the reaction tank is provided with multiple sludge discharge ports, the height of which is lower than the height of the sewage discharge base plate.

[0011] Furthermore, it also includes a reaction tank frame, on which the reaction tank body is supported.

[0012] Furthermore, it also includes a gas collection hood, with an opening at the top of the reaction tank. The gas collection hood is fixedly installed at the top of the reaction tank and closes the opening at the top of the reaction tank.

[0013] Furthermore, the top of the gas collection hood is provided with a tail gas discharge port, which is connected to the tail gas collection pipe.

[0014] Furthermore, cathode copper busbars and anode copper busbars are respectively provided on the outside of the reaction tank body, all cathode plates are connected to the cathode copper busbars, and all anode copper busbar plates are connected to the anode copper busbars.

[0015] Furthermore, the ultraviolet lamp is installed in the ultraviolet catalytic chamber via a lamp holder, and the lamp holder is fixed to the inner wall of the reaction tank.

[0016] Furthermore, the anode plate includes a first anode plate and a second anode plate. The first anode plate is a titanium-coated ruthenium-iridium plate, and the second anode plate is a titanium-coated lead dioxide anode plate or a titanium-coated tin dioxide anode plate. The first anode plate and the second anode plate are arranged alternately.

[0017] Furthermore, the cathode plate is a carbon substrate, and the carbon substrate is doped with one or more elements such as nitrogen, boron, and sulfur.

[0018] The beneficial effects of this integrated wastewater treatment device with ultraviolet synergistic electrocatalytic oxidation are as follows: The reaction tank of the wastewater treatment device is equipped with a water treatment chamber and an overflow chamber; the water treatment chamber is equipped with an electrocatalytic oxidation zone including an electrolysis chamber and an ultraviolet catalytic oxidation zone including an ultraviolet catalytic chamber. The electrocatalytic oxidation zone can generate active chlorine in the electrolysis chamber to remove organic matter from the wastewater, while the ultraviolet catalytic chamber can catalyze residual chlorine in the wastewater using ultraviolet light, thereby achieving efficient treatment of chlorine-containing wastewater and reducing the burden of subsequent residual chlorine degradation treatment. This wastewater treatment device does not require the addition of a physical catalyst; it utilizes the synergistic effect of multiple oxidants such as electrogenerated hypochlorous acid and hydrogen peroxide (H2O2) to avoid secondary pollution. Furthermore, the water treatment chamber of this wastewater treatment device adopts a baffled design, which can extend the residence time of wastewater in the water treatment chamber, reduce the amount of electrode plates used, thereby reducing the size of the wastewater treatment device and lowering its production cost. Attached Figure Description

[0019] Figure 1This is a cross-sectional view of the internal structure of an integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation, according to an embodiment of this utility model.

[0020] Figure 2 yes Figure 1 Cross-sectional view at point AA (gas collection hood not shown).

[0021] Figure 3 yes Figure 1 Cross-sectional view at point BB.

[0022] In the above figure: 1-Reaction tank body, 11-Overflow plate, 12-Overflow gate, 13-Baffle plate, 14-Inlet chamber, 15-Overflow chamber, 2-Reaction tank frame, 3-Gas collection hood, 31-Tail gas discharge port, 4-Cathode copper busbar, 41-Cathode plate, 5-Anode copper busbar, 51-Anode plate, 6-UV lamp tube, 7-Sewage discharge bottom plate, 71-Sewage discharge hole, 8-Sludge discharge port. Detailed Implementation

[0023] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0024] Please refer to Figures 1 to 3 This utility model discloses an integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation, comprising a reaction tank body 1 and a reaction tank frame 2; the reaction tank body 1 is a rectangular open-top structure, and a gas collection hood 3 is provided on the top of the reaction tank body 1. The gas collection hood 3 is fixedly installed on the top of the reaction tank body 1 and closes the opening at the top of the reaction tank body 1. The gas collection hood 3 is made of transparent material or has a transparent observation window.

[0025] The reaction tank 1 is equipped with an overflow plate 11, which divides the cavity inside the reaction tank 1 into a water treatment chamber and an overflow chamber 15. The water treatment chamber is equipped with N baffles 13, which divide the cavity into N+1 water treatment compartments. In this embodiment, there are five baffles 13 and six water treatment compartments. Each baffle 13 forms a baffle opening between its side edge and the inner wall of the reaction tank 1. All baffle openings are staggered. The two water treatment compartments located at both ends of the water treatment compartment are the inlet chamber 14 and the ultraviolet catalytic chamber, respectively. The remaining water treatment compartments are multiple electrolysis compartments. The ultraviolet catalytic chamber is located near the overflow chamber 15 and is also equipped with a flow guide baffle to ensure that the wastewater inside the ultraviolet catalytic chamber can flow completely through it. The inlet chamber 14 is connected to an inlet pipe, and the overflow chamber 15 is connected to a drain pipe.

[0026] Each electrolysis chamber is equipped with multiple cathode plates 41 and anode plates 51, which are arranged alternately; the ultraviolet catalytic chamber is equipped with multiple ultraviolet lamps 6.

[0027] When this integrated wastewater treatment device with UV-assisted electrocatalytic oxidation is in operation, the wastewater to be treated enters the inlet chamber 14 through the inlet pipe, and then enters the overflow chamber 15 after passing through all the baffles in sequence. During this process, the wastewater to be treated passes through all the electrolysis chambers and the UV catalytic chamber in sequence. The cathode plate 41 and anode plate 51 in the electrolysis chamber electrolyze the wastewater, causing the chlorine-containing organic wastewater to produce highly oxidizing components such as hypochlorous acid (which is produced by dissolving chlorine gas generated during electrolysis) and hydrogen peroxide, thereby oxidizing the organic matter in the chlorine-containing organic wastewater. The UV catalytic chamber can catalyze the residual chlorine in the wastewater through ultraviolet light. The treated wastewater is discharged through the drain pipe connected to the overflow chamber 15.

[0028] This wastewater treatment device eliminates the need for physical catalysts and additional oxidants during the treatment process. It utilizes the synergistic effect of multiple oxidants, such as hypochlorous acid and hydrogen peroxide generated by electrolysis, to prevent secondary pollution. Furthermore, the water treatment chamber employs a baffled design, which extends the residence time of wastewater within the chamber, reduces the number of electrode plates required, and consequently decreases the size and production cost of the wastewater treatment device.

[0029] In a preferred embodiment, all water treatment chambers are further provided with a drain base plate 7 at the bottom, and the drain base plate 7 has multiple through sludge discharge holes 71 distributed on it. There is a gap between the drain base plate 7 and the bottom of the reaction tank 1. The lower part of the reaction tank 1 is also provided with multiple sludge discharge ports 8. The height of the sludge discharge ports 8 is lower than the height of the drain base plate 7. Solid impurities in chlorinated organic wastewater will gradually deposit and pass through the drain base plate 7 into the gap between the drain base plate 7 and the bottom of the reaction tank 1. The sludge discharge ports 8 are opened periodically, so that the solid deposits in the reaction tank 1 can be discharged periodically.

[0030] In a preferred embodiment, the top of the gas collection hood 3 is provided with a tail gas discharge port 31, which is connected to a tail gas collection pipe. During the electrolysis process in the electrolysis chamber, a certain amount of chlorine gas is generated. Since the chlorine gas cannot be completely dissolved in wastewater, some residual chlorine gas will accumulate inside the gas collection hood 3. The tail gas collection pipe can collect this chlorine gas for centralized treatment, preventing environmental pollution from electrolysis tail gas.

[0031] In a preferred embodiment, the outer side of the reaction tank 1 is respectively provided with cathode copper busbars 4 and anode copper busbars 5. All cathode plates 41 are connected to the cathode copper busbars 4, and all anode copper busbar plates 51 are connected to the anode copper busbars 5. It should be understood that the reaction tank 1, the baffle plate 13, the reaction tank frame 2, etc., are all made of insulating material, which can be one or a combination of PP plastic or UPVC plastic. This ensures that the outer wall of the entire device is insulated and prevents electric shock.

[0032] In a preferred embodiment, the ultraviolet lamp 6 is installed in the ultraviolet catalytic chamber via a lamp holder, and the lamp holder is fixed to the inner wall of the reaction tank 1.

[0033] In a preferred embodiment, the anode plate 51 includes a first anode plate and a second anode plate. The first anode plate is a titanium-coated ruthenium-iridium plate (i.e., a titanium substrate coated with a ruthenium-iridium coating), and the second anode plate is a titanium-coated lead dioxide anode plate or a titanium-coated tin dioxide anode plate. The first and second anode plates are arranged alternately. The cathode plate 41 is a carbon substrate, which is doped with one or more elements such as nitrogen, boron, and sulfur. The titanium-coated ruthenium-iridium structure has chlorine evolution characteristics, and the titanium-coated lead dioxide / tin dioxide structure has high hydroxyl radical characteristics. The electrodes made of heteroatom-modified carbon-based materials have high selectivity and high stability, effectively promoting the generation of hydrogen peroxide at the cathode. The above electrode materials and arrangement structure can effectively improve the degradation efficiency of toxic and harmful organic pollutants in wastewater.

[0034] In a preferred embodiment, the reaction tank body 1 is provided with an overflow plate 11 and an overflow port at the top. An overflow gate 12 is provided inside the overflow port. The overflow gate 12 is used to adjust the overflow height, thereby adjusting the overflow drainage volume.

[0035] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0036] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation, characterized in that: Including the reaction tank body (1); The reaction tank (1) is provided with an overflow plate (11), which divides the cavity inside the reaction tank (1) into a water treatment cavity and an overflow cavity (15). The water treatment chamber is provided with N baffles (13), which divide the cavity inside the water treatment chamber into N+1 water treatment chambers. The side edge of each baffle (13) forms a baffle opening between the inner wall of the reaction tank body (1), and all the baffle openings are arranged in an alternating pattern. The two water treatment chambers located at both ends of the water treatment chamber are the inlet chamber (14) and the ultraviolet catalytic chamber, respectively. The remaining water treatment chambers are electrolysis chambers. The ultraviolet catalytic chamber is close to the overflow chamber (15). The inlet chamber (14) is connected to an inlet pipe, and the overflow chamber (15) is connected to a drain pipe. Each electrolysis chamber is equipped with multiple cathode plates (41) and anode plates (51); the cathode plates (41) and anode plates (51) are arranged alternately; The ultraviolet catalytic chamber is equipped with multiple ultraviolet lamps (6).

2. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 1, characterized in that: All water treatment chambers are also provided with a drain base plate (7) at the bottom, and the drain base plate (7) has multiple through sludge discharge holes (71).

3. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 2, characterized in that: The reaction tank body (1) is also provided with multiple sludge discharge ports (8) at the bottom, and the height of the sludge discharge ports (8) is lower than the height of the sewage discharge bottom plate (7).

4. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 1, characterized in that: It also includes a reaction tank frame (2), on which the reaction tank body (1) is supported.

5. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 1, characterized in that: It also includes a gas collection hood (3), the top of the reaction tank (1) has an opening, the gas collection hood (3) is fixedly installed on the top of the reaction tank (1) and closes the opening at the top of the reaction tank (1).

6. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 5, characterized in that: The top of the gas collection hood (3) is provided with a tail gas discharge port (31), which is connected to the tail gas collection pipe.

7. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 1, characterized in that: The outer side of the reaction tank (1) is provided with a cathode copper busbar (4) and an anode copper busbar (5). All cathode plates (41) are connected to the cathode copper busbar (4), and all anode plates (51) of the copper busbar are connected to the anode copper busbar (5).

8. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 1, characterized in that: The ultraviolet lamp (6) is installed in the ultraviolet catalytic chamber through the lamp holder, and the lamp holder is fixed to the inner wall of the reaction tank (1).

9. The integrated wastewater treatment device for ultraviolet-assisted electrocatalytic oxidation according to claim 1, characterized in that: The anode plate (51) includes a first anode plate and a second anode plate. The first anode plate is a titanium-coated ruthenium-iridium plate, and the second anode plate is a titanium-coated lead dioxide anode plate or a titanium-coated tin dioxide anode plate. The first anode plate and the second anode plate are arranged alternately.

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